package com.bprogram.utils;


import com.bprogram.dto.Mail;
import com.bprogram.dto.MailBox;

import java.util.Properties;

import javax.mail.Authenticator;

import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;

import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMessage.RecipientType;


public class SendMailUtil {

    private static volatile SendMailUtil singleton = null;
    private MailBox mailBox = new MailBox();
    private Mail mail = new Mail();

    private SendMailUtil() {
    }

    public static SendMailUtil getSingleton() {
        if (singleton == null) {
            synchronized (SendMailUtil.class) {
                if (singleton == null) {
                    singleton = new SendMailUtil();
                }
            }
        }
        return singleton;
    }

    public void setProperties(MailBox b) {
        this.mailBox = b;
    }

    public void setMail(Mail b) {
        this.mail = b;
    }

    public void sendQQSmtpEmail() throws Exception {
        // 创建Properties 类用于记录邮箱的一些属性
        final Properties props = new Properties();
        // 表示SMTP发送邮件
        props.put("mail.smtp.auth", mailBox.getMailSmtpAuth());
        // 此处填写SMTP服务器
        props.put("mail.smtp.host", mailBox.getMailSmtpHost());
        // 端口号，QQ邮箱给出了两个端口
        props.put("mail.smtp.port", mailBox.getMailSmtpPort());
        // 此处填写你的账号
        props.put("mail.user", mailBox.getMailUser());
        // 此处的密码就是授权码（例：申请qq邮箱的POP3服务时，发送短信获取到的授权码）
        props.put("mail.password", mailBox.getMailPassword());
        // 构建授权信息，用于进行SMTP进行身份验证
        Authenticator authenticator = new Authenticator() {

            protected PasswordAuthentication getPasswordAuthentication() {
                // 用户名、密码
                String userName = props.getProperty("mail.user");
                String password = props.getProperty("mail.password");
                return new PasswordAuthentication(userName, password);
            }
        };
        // 使用环境属性和授权信息，创建邮件会话
        Session mailSession = Session.getInstance(props, authenticator);
        // 创建邮件消息
        MimeMessage message = new MimeMessage(mailSession);
        // 设置发件人
        InternetAddress form = new InternetAddress(props.getProperty("mail.user"));
        message.setFrom(form);

        // 设置收件人的邮箱
        InternetAddress to = new InternetAddress(mail.getSendTo());
        message.setRecipient(RecipientType.TO, to);

        // 设置邮件标题
        message.setSubject(mail.getSubject());

        // 设置邮件的内容体
        message.setContent(mail.getText(), "text/html;charset=UTF-8");

        // 最后当然就是发送邮件啦
        Transport.send(message);
    }

}
